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<title>The t Command</title>
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<h1>t / to</h1>
<!--INDEX "t command" "to command" "single step" "trace command"  -->

<p>The t command performs a trace (single step) operation.</p>

<h2>Format</h2>

<p>The format for this command is:</p>
<blockquote>
  <pre><font size="+1"> t [-vbci] 
   or:<br>to [-vbci]</font> </pre>
</blockquote>
<p>where:</p>
<dl>
  <table width="95%">
    <tr bgcolor="#CCCCCC"> 
      <td width="32" align="right" valign="top">-v&nbsp;&nbsp; </td>
      <td width="224" align="left" valign="top">lists each step (verbose). </td>
    </tr>
    <tr> 
      <td width="32" align="right" valign="top">-b &nbsp;&nbsp;</td>
      <td width="224" align="left" valign="top">captures only branches. </td>
    </tr>
    <tr bgcolor="#CCCCCC"> 
      <td width="32" align="right" valign="top">-c &nbsp;&nbsp;</td>
      <td width="224" align="left" valign="top">captures only funtion calls. </td>
    </tr>
    <tr> 
      <td width="32" align="right" valign="top">-i &nbsp;&nbsp;</td>
      <td width="224" align="left" valign="top">stops on invalid program counter. 
      </td>
    </tr>
    <tr bgcolor="#CCCCCC"> 
      <td width="32" align="right" valign="top">cnt &nbsp;&nbsp;</td>
      <td width="224" align="left" valign="top">traces cnt instructions and stops. 
      </td>
    </tr>
  </table>
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<h2>Functional Description</h2>

<dl> 
  <dd>The t command executes the instruction addressed by the current value of 
    the <em>user PC</em> register. </dd>
  <dt>&nbsp;</dt>
  <dt>The to command is similar to the t command, except that the to command treats 
    an entire procedure as a single step.The command or commands that are executed 
    on completion of the single step is determined by the value of the environment 
    variable <b><a href="c_set.htm#brkcmd">brkcmd</a></b>.</dt>
</dl>
<h2>See Also:</h2>
<blockquote>
  <p><a href="c_set.htm">set / unset</a> command.</p>
</blockquote>
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